package zisu.netty.practice.netty.simple;

import io.netty.bootstrap.Bootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioSocketChannel;

/**
 * @Desc: ""
 * @Author: caixiang
 * @DATE: 2020/7/8 13:34
 */
public class NettyClient {
    public static void main(String[] args) throws InterruptedException {
        //客户端需要一个事件循环组
        NioEventLoopGroup eventExecutors = new NioEventLoopGroup();

        try {
            //创建客户端启动对象
            //注意客户端 使用的不是 ServerBootstrap 而是Bootstrap
            Bootstrap bootstrap = new Bootstrap();

            //设置相关参数
            bootstrap.group(eventExecutors)                 //设置线程组
                    .channel(NioSocketChannel.class)        //设置客户端通道的实现类（反射来处理）
                    .handler(new ChannelInitializer<SocketChannel>() {
                        @Override
                        protected void initChannel(SocketChannel ch) throws Exception {
                            ch.pipeline().addLast(new NettyClientHandler());   //加入自己的处理器
                        }
                    });
            System.out.println("客户端 ok");

            //启动客户端 去连接服务器端   ,,加sync 会使这个方法不会阻塞在这里
            ChannelFuture channelFuture = bootstrap.connect("127.0.0.1", 6668).sync();

            //给关闭通道进行监听
            channelFuture.channel().closeFuture().sync();
        }finally {
            eventExecutors.shutdownGracefully();
        }
    }
}
